106 (#158) ############################################ WOOLLEN AND WORSTED SPINNING Further treatment must be left to the monograph on the mule which will no doubt appear in due course. * * (a) The Basic Method of Mule Spinning.—This will best be realized by actually spinning from the con- densed sliver upon the spinning wheel (i.e. the normal bobbin winding wheel, Fig. 35). It will then be found that this resolves itself into- I. delivery of a suitable length of the condensed sliver from the holding fingers of the spinster, to extend between the fingers and the end of the revolving spindle ; 2. the extension of this length so that the required count of yarn is obtained, along wit 3. the twist support given (by slowly revolving the wheel and consequently the spindle) during this extension, without which the thread would break down or be very irregular (Fig. 35a) ; 4. upon the completion of the “spindle-drafting the insertion of the necessary twist to bind the fibres into the type of thread required ; 5. the “backing-off” or unwinding of the coils extending from the spun yarn already wound on to the cop or bobbin up to the point of the spindle, as preparatory to winding neatly on to the spindle or bobbin the length of yarn just spun ; 6. the building up upon the "cop cop” or upon the bobbin fixed upon the spindle, the length of yarn just spun (Fig. 356). Of the above six operations comprising the “cycle in mule spinning, the second usually referred to as 106